package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.common.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * springMvc viewcontroller:将请求和页面映射过来
     * @return
     */
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //TODO 1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000){
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2、验证码的再次校验。redis.存key-phone,value-code    sms:code:18665987756 -> 456789
        String toCode = UUID.randomUUID().toString().substring(0, 5);
        System.out.println("toCode----------" + toCode);
        String code = toCode + "_" + System.currentTimeMillis();
        //redis缓存验证码，防止同一个手机号在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone,code,20,TimeUnit.MINUTES);
        //thirdPartFeignService.sendCode(phone,toCode);
        return R.ok();
    }

    /**
     * //TODO 重定向携带数据，利用session原理，将数据放在session中，
     * 只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     *
     * //TODO  分布式下的session问题
     *
     * RedirectAttributes redirectAttributes：模拟重定向
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
//            Map<String,String > errors = new HashMap<>();
//            result.getFieldErrors().stream().map(fieldError -> {
//                String field = fieldError.getField();
//                String defaultMessage = fieldError.getDefaultMessage();
//                errors.put(field,defaultMessage);
//                return errors;
//            });
//            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(fieldError -> {
//                return fieldError.getField();
//            }, fieldError -> {
//                return fieldError.getDefaultMessage();
//            }));
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            //model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            //Request method 'POST' not supported
            //用户注册->/regist[post] ----->转发/reg.html（路径映射默认都是get方式访问）
            //return "forward:/reg.html"; 转发    如果是post请求，会出现Request method 'POST' not supported
            //return "redirect:/reg.html";重定向  重定向到本机的页面
            //return "reg"; 这样会出现重复提交表单
            return "redirect:http://auth.gulimall.com/reg.html"; //如果在分布式下,会有分布式session问题
        }


        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(StringUtils.isEmpty(s)){
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html"; //如果在分布式下,会有分布式session问题
        }
        String code = vo.getCode();
        String[] split = s.split("_");
        if(code.equals(split[0])){
            //删除验证码;令牌机制
            redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
            //验证码正确  //真正注册 , 调用远程服务进行注册
            R r = memberFeignService.regist(vo);
            if(r.getCode() == 0){
                //成功
                return "redirect:http://auth.gulimall.com/login.html";
            }else {
                //失败
                Map<String,String> errors = new HashMap<>();
                errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }

        }else{
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html"; //如果在分布式下,会有分布式session问题
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session){
        //远程登录
        R r = memberFeignService.login(vo);
        if(r.getCode() == 0){
            MemberResponseVo data = r.getData("data",new TypeReference<MemberResponseVo>(){});
            //成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }

        Map<String,String> errors = new HashMap<>();
        errors.put("msg",r.getData("msg",new TypeReference<String >(){}));
        redirectAttributes.addFlashAttribute("errors",errors);
        return "redirect:http://auth.gulimall.com/login.html";
    }
}
